Help with using a multiplexer.

[Tim S.]

I am a LabVIEW rookie using version 6.1. I have obtained a PCI-1200 DAQ board and would like to use it to collect 16 analog input signals. I currently have a 16 channel multiplexer and would like to use this to obtain my signals, and send them to the DAQ via a single analog input. My thought is that I have to use the digital lines to control the scanning of the multiplexer. But, as I said I am new to LabVIEW and am in need of some serious help.

Thanks alot,


Tim S.

[Filipe A.]

Tim;

That is not going to be possible by using the board you have. The main limitation of the board as far as that task, is the fact its digital lines are updated through Software calls, meaning that the update rate won't be accurate and deterministic enough to accomplish that.

You need to have a digital board to work together with the MIO boards, generating the digital patterns, or to work with NI Multiplexer. In case you choose NI multiplexer, you won't need to worry about its timing.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments